body {
    margin: 0 300px;
    font-size: 16px;
    font-family: "微软雅黑";
    line-height: 30px;
}
div,p,ul,li,h1 {
    height: auto;
    padding: 0;
    vertical-align: middle;
    list-style: none;
    margin: 0;
}
div{
    margin-top: 30px;
}
.top{
    height: 50px;
    line-height: 10px;
    background: whitesmoke;
    font-size: 12px;
}
.top h1{
    text-align:left;
}
.top p{
    text-align:right;
    margin: 20px 10px 20px 10px;
}
.web{
    font-weight:bold; /*文字粗体*/
    font-style: italic;
}